Floating eccentric



Aug. '25, 1942. Y M. c.. BLoosEvlTcH 2,293,695

FLOATING ECCETRIC Filed OCT.. 17, 1941 2 Sheets-Shee l ,ETE ff Aug. 25, 1942. M. G. BLoosEVi'l-CH 293,695

FLOATING ECCENTRIC Filed ooi. 17, 1941 2 Sheets-sheet 2 El 'E fj \L 6 /9 i I *f- Illu" n Q U 0 6 0 b D B 0 0 I L 9 gli /4 7 f l :FI '4| Q d? ff f E f my M22 n )N u W W 22 [lire/lor l 1- @MMM Patented Aug. 25, 1942 .il i 'i' 3 Ciaiins.

My vinvention relates to a floating eccentric which is adjustable while the rotary member on which the eccentric 4is carried is rotating, from concentricity to any degree of eccentricity within the limits of Athe adjustment, and the primary object of my invention is to provide a simple and efcient arrangement/of this character.

Other important objects and advantages of my invention will be apparent from a reading of the following description taken in connection with the appended drawings, wherein for purposes of illustration I have shown a preferred embodiment of my invention.

In the drawings:

Figure 1 is a general side elevational View showing a rotary shaft equipped in accordance with the present invention, showing the eccentric in concentric position.

Figure 2 .is a side eleva-tional view taken at approximately 90 degrees from the position shown in Figure l, and showing the eccentric adjustedl to an eccentric position.

Figure 3 is a fragmentary longitudinal sectional view taken through Figure 2 along the line 3 3.

Figure 4 is a longitudinal sectional view taken through Figure 1 along the line 4 4.

Figure 5 is a transverse vertical sectional View taken through Figure l along the line 5 5.

Figure 6 is an enlarged transverse vertical sectional view taken through Figure 3 along the line 6 6.

Referring in detail to the drawings, the numeral 5 generally designates a drive shaft or other axially rotating element, the same having a transversely enlarged portion I5 or the equivalent, which in this instance, is rectangular in cross section. rIhe circular eccentric 'I may be a substantially solid body formed diametrically with an elongated rectangular opening 8, providing relative movement therein of the eccentric carrying portion 6, as clearly indicated in Figure 5 of the drawings. The sides of the carrier 6 may slide against the sides of the opening 8, or these surfaces may be slightly spaced as indicated in Figure 5 of the drawings, in accordance with circumstances.

The eccentric 'I is mounted on the carrier portion 6 of the drive shaft 5 by a rotary column 9 which has pintles IIJ turning in depressions in the ends of the opening 8, as illustrated in Figures 4 and 5, and further provided with threaded portions I I adjacent the pintles, the said threaded portions engaging companion threads in the transverse centralized bore I2 of the carrier portion 6. The column 9 is hexagonal in shape as indicated by the numeral I3, for a distance between the inner ends of the threaded portions I I, and slidable along this hexagonal portion I3 is a sprocket wheel I4 which is thereby non-rotatably and -slidablyconnected to the said column. The gear or sprocket I4 extends laterally from the bore I2 into opposite sides of an opening I5 which is wide enough only to allow free turning of the gear or sprocket I4, whilepreventing any substantial travel of the gear or sprocket I4 along the hexagonal portion I3 of the column 9. For convenience and ease in assembly the opening .I5 extends, as indicated in Figure v3 of the drawings, through one side of the carrier portion E as indicated by the numeral I6, and the gear or sprocket I4 is made in two assembled sections as also shown in Figure 3 of the drawings.

Communicating with one end of the opening I5 are channels or grooves Il and I8 formed longitudinally in diametrically opposite sides vof the drive shaft 5, and in these grooves protectively slide flights IQ and 2t, respectively, of VVa sprocket chain which Vis trained around the sprocket wheel I4,

A longitudinally spaced pair of shift rings 2| and 22 are slidably circumposed on the drive shaft 5, and the sprocket chain flight I9 is operatively connected to the shift ring 22, and the end of the sprocket chain flight 25 is connected to the shift ring 2l. Suitable supports 23 and 24 pivotally mount the respective operating levers 25 and 25 which are corresponding forks 21 and 28 having pins engaged in the grooves of the shift rings. Manual or mechanical operation of the levers 25 and 2G toward each other spreads the shift rings 2l and 22 and thereby operates the sprocket chain so as to turn the column 9 in a direction to move the eccentric I to a position of eccentricity with respect to the drive shaft 5, while movement of the levers in the opposite direction restores the eccentric I to a position of concentricity with the shaft 5. With the shift rings 2| and 22 turning freely and slidably on the drive shaft, the eccentric 'I can be adjusted to the desired amount of eccentricity while the shaft 5 is rotating at any speed.

Although I have shown and described herein a preferred embodiment of my invention, it is to be denitely understood that I do not wish to limit the application of my invention thereto, except as may be required by the scopeY of the subjoined claims.

Having described the claimed as new is:

1. In combination, an axially rotatable shaft having a diametrical enlargement having opposed plane exterior surfaces, an eccentric comprising a circular body formed with a transversely elongated opening conformably receiving said diametrical enlargement, an axially rotatable column having its opposite ends journaled in the end wall of said elongated opening, said co1- umn having longitudinally spaced threaded portions and a non-cylindrical portion between said invention, what y is threaded portions, said enlargement being formed With a bore having longitudinally threaded sections in which the threaded portions of the column work, a gear having a central hole slidably conforming to said non-cylindrical portion of the column and securing said gear for rotation with the column, means preventing axial movement of said gear relative to said enlargement, and operating means on said shaft for turning said gear to adjust said eccentric from concentricity to eccentricity with respect to said shaft.

2. In combination, an axially rotatable shaft having a diametrical enlargement having opposed plane exterior surfaces, an eccentric comprising a circular body formed with a transversely elongated opening conformably receiving said diametrical enlargement, an axially rotatable column having its opposite ends journaled in the end Wall of said elongated opening, said column having longitudinally spaced threaded portions and a non-cylindrical portion between said threaded portions, said enlargement being formed With a bore having longitudinally threaded sections in which. the threaded portions of the column Work, a gear having a central hole slidably conforming to said non-cylindrical portion of the column and securing said gear for rotation with the column, means preventing axial movement of said gear relative to said enlargement, and operating means on said shaft for turning said gear to adjust said eccentric from concentricity to eccentricity With respect to said shaft, said operating means comprising a chain trained on said gear, said chain having flights extending along said shaft, axially slidable shift rings on said shaft and individually connected to the corresponding chain flights, and lever means for moving the shift rings along the shaft to rotate said gear in the desired direction.

3. In combination, an axially rotatable shaft having a diametrical enlargement having opposed plane exterior surfaces, an eccentric comprising a circular body formed with a transversely elongated opening conformably receiving said diametrical enlargement, an axially rotatable column having its opposite ends journaled in the end Wall of said elongated opening, said column having longitudinally spaced threaded portions and a non-cylindrical portion between said threaded portions, said enlargement being formed with a bore having longitudinally threaded sections in which the threaded portions of the column Work, a gear having a central hole slidably conforming to said non-cylindrical portion of the column and securing said gear for rotation with the column, means preventing axial movement of said gear relative to said enlargement, and operating means on said shaft for turning said gear to adjust said eccentric from concentricity to eccentricity with respect to said shaft, said operating means comprising a chain trained on said gear, said chain having flights extending along said shaft, axially slidable shift rings on said shaft and individually connected to the corresponding chain flights, and lever means for moving the shift rings along the shaft to rotate said gear in the desired direction, said chain flights being protectively positioned Within longitudinal grooves formed in the sides of the shaft.

' MICHZAIL GEORGE BLOOSEVITCH. 

